Issue 103842

Created attachment 63807 [details]
example file

Please add some screenshots and mark the problem or describe it more precise.
Thanks!

I add a screenshot of the impress problem. You can see that the lines width 
are different at presentation time and design time

Created attachment 63818 [details]
example shot

Sorry, not reproducible here. Is this a special monitor resolution you are
using? Does it happen when you deselect AntiAliasing under Tools/options/view
graphics output? Thanks for your help.

wg, cannot you see that some lines have different width at edition time and at
presentation time? Another difference is that grey lines may appear as black at
presentation time (as pointed out in the screenshot).

Some other times, the white spaces between cell borders are black at
presentation time....

When switching from antialiasing to not antialiasing the difference is shown
only at edition time. At presentation time the result is the same both with and
without antialiasing.

We want the result to llok exactly the same at edition time and at presentation
time when it comes to lines borders, widths and colors.

Did this provide enough detail in order to be able to reproduce the bug?

Thanks!

When anti aliasing is switched off you say that the problem is only visible in
edit view. Does it consist even if you zoom into the view? I think that this is
a problem connected to Anti-aliasing and the used monitor resolution. I can only
reproduce something if I chose Slide Show/SlideShow Settings ,Type Window. With
a quite small window something similar to your screenshot appears. Normally I
use a 24 inch Monitor and cannot reproduce your problem. Whats your monitor
resolution?

Hi wg, i am attaching three aditional shots in order to provide more details:

- In edition mode, (using my laptop: 1280x800 resolution) when i zoom into the
grid, i see it much better. Please have a look at file
"edition_mode_with_150_zoom.jpg"

- In presentation mode (using my laptop: 1280x800), the problems appear. Please
have a look at "presentation_mode_1280x800.jpg"

- In presentation mode, using another computer (1280x1024 resolution), problems
do not appear. Example in file: "presentation_mode_1280x1024.jpg"

Hope this helps

Created attachment 64472 [details]
Presentation mode 1280x1024

Created attachment 64473 [details]
Presentation mode 1280x800

Created attachment 64474 [details]
Presentation mode 1280x800

Created attachment 64475 [details]
Edition mode with zoom

Please try if the problem exists when Anti Aliasing is switched off : uncheck
Tools/options/view/use anti aliasing. Thanks again.

the problem persists whe antialiasing is disabled. See attachment:
"presentation_mode_1280x800_antialiasing_disabled.jpg"

Created attachment 64526 [details]
Presentation mode 1280x800 antialiasing disabled

I tried to replicate the bug on window xp proffessional edition service pack 3 
on a toshiba laptop of 1GB of ram with 1.66hz processing speed. I couldn't 
replicate the bug. If you can add some information on how you created the table 
diagram which shows difference at design and slide show.I created the table 
insert table command. 

Created attachment 64683 [details]
screenshot of small window

Created attachment 64684 [details]
Screenshot of medium window

Created attachment 64685 [details]
Screenshot of large window

I think I have replicated this, but I don't think that what I see is a bug, or
if we call it a bug, not a bug that is within the reasonable control of the OOo
team.

Configuration: Dell Precision M6300 1920x1200 display, Windows XP, OOo-dev 3.2.0
DEV300m55, antialiasing turned off

(1) download file prueba.odp from the attachments above
(2) Set zoom to variable so the slide is scaled to fit within the window
(3) Scale the window (make it small, see small.jpg, make it bigger, see
medium.jpg, make it bigger, see large.jpg)
(4) The slide should show vertical and horizontal lines that are styled as two
relatively lightweight parallel lines. Instead, at different scalings, some of
the horizontals or verticals are displayed as one thick black line rather than
two thinner parallel lines separated by whitespace. This looks like the same
distortion identified in attachment: Tue Sep 1 09:50:00 +0000 2009:
presentation_mode_1280x800.jpg

I see this kind of distortion when resizing windows in other applications. The
display algorithm has a rounding error (I assume) and fills in the space between
the lines. Given that I see this in other applications (Adobe Premiere for
example), I assume this is a minor bug in a library routine used by OOo and many
other applications, or perhaps in libraries provided with Windows. 

The usual workaround is to display the window at a resolution that is an even
multiple of the resolution at which the slide was created, so that we aren't
attempting to draw, for example, a 3-pixel wide area into a 2-pixel or 5-pixel
area. Drawing those half-pixels is a nuisance. Similarly, the height should
probably be multiplied by the same amount as the width.

Maybe my intuition about cause is incorrect but the workaround does appear to
work for these slides on my machine.

Hi cemkaner, you didi it. You replicated the problem. I agree with you that
rounding widths of lines is a behaviour shown in other pieces of SW but main
problem here is that the rounding is not done in a consistent way. Some times in
a use case witdh is rounded to 2 and some other times -in a similar use case- it
is rounded to 1.

This makes auwful the visualization of the file when it comes to slideshow mode.

Two last things:

-> Same grid is perfectly shown by PowerPoint (we are trying to migrate)
-> The resolution is not a proper workaround because we cannot guarantee the
resolution that we are going to find in customer dependencies when showing this
presentation.

What do you think?

@cemkaner: thanks for your explicit help!
Reassinged. @af: is there something that could be done about this rounding problem? 

We’ve tried version 3.2 and the error is still in there.

Reset assigne to the default "issues@openoffice.apache.org".